<!--
 * @Description: 添加商品页面
 * @Author: guotingting
-->
<!-- 组件说明 -->
<template>
  <div class="add">
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 提示框 -->
    <el-card>
      <el-alert
        title="添加商品"
        type="info"
        center
        show-icon
      >
      </el-alert>

      <!-- 进度条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tabs栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="tabPosition"
          v-model="activeIndex"
          :before-leave="beforetableLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane
            label="基本信息"
            name="0"
          >
            <el-form-item
              label="商品名称"
              prop="goods_name"
            >
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item
              label="商品价格"
              prop="goods_price"
            >
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item
              label="商品重量"
              prop="goods_weight"
            >
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item
              label="商品数量"
              prop="goods_number"
            >
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item
              label="商品分类"
              prop="goods_cat"
            >
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            label="商品参数"
            name="1"
          >
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTable"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            label="商品属性"
            name="2"
          >
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTable"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            label="商品图片"
            name="3"
          >
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button
                size="small"
                type="primary"
              >点击上传</el-button>
              <template #tip>
                <div class="el-upload__tip">
                  只能上传 jpg/png 文件，且不超过 500kb
                </div>
              </template>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane
            label="商品内容"
            name="4"
          >
            <!-- 富文本编辑框 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button
              type="primary"
              class="add-btn"
              @click="add"
            >添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 预览窗口 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%"
    >
      <img
        :src="previewPath"
        alt="图片"
        class="previewImg"
      >
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  components: {

  },
  data () {
    return {
      activeIndex: '0',
      tabPosition: 'left',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: '',
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      catelist: [], // 商品分类
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyTable: [],
      // 静态属性参数列表
      onlyTable: [],
      // 上传图片的链接
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 设置上传请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览路径
      previewPath: '',
      previewVisible: false
    }
  },
  computed: {
    // 分类id
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }

  },
  methods: {
    // 获取商品分类
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败!')
      }
      // 获取分类成功
      this.$message.success('获取商品分类成功！')
      console.log(res.data)
      this.catelist = res.data
    },
    // 级联选择框中选中项变化会触发该函数
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 离开当前tab
    beforetableLeave (activeName, oldActiveName) {
      // console.log('即将离开的标签页名字:' + oldActiveName)
      // console.log('即将进入的标签页名字：' + activeName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        // 提示原因
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // 点击的tab
    async tabClicked () {
      console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取分类数据失败！')
        }
        this.manyTable = res.data
        console.log(this.manyTable, 'manyTable')
        // 将字符串转换为数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals === '' ? [] : item.attr_vals.split(' ')
        })
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        this.onlyTable = res.data
        console.log(this.onlyTable, 'onlyTable')
      }
    },
    // 处理图片预览
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理图片移除
    handleRemove (file) {
      console.log(file)
      const filePath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex(item => item.pics === filePath)
      this.addForm.pics.splice(index)
      console.log(this.addForm, '移除后addForm')
    },
    // 处理图片上传成功时的事件
    handleSuccess (response) {
      console.log(response, 'response')
      const picsInfo = {
        pics: response.data.tmp_path
      }
      this.addForm.pics.push(picsInfo)
      console.log(this.addForm, 'addForm')
    },
    // 添加商品事件
    add () {
      // console.log(this.addForm)
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加表单的业务逻辑
        // 深拷贝 cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = this.addForm.goods_cat.join(',')
        // console.log(form, 'form')
        // 处理动态参数和静态属性
        this.manyTable.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTable.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form, 'form')
        // 添加商品，商品名称唯一
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功!')
        // 路由跳转
        this.$router.push('/goods')
      })
    }
  },
  created () {
    this.getCateList()
  }
}
</script>

<style lang="less" scoped>
//@import url()
.el-steps {
  margin: 20px 0;
}
/deep/ .el-steps .el-step__title {
  font-size: 13px;
}
.el-cascader {
  width: 300px;
}
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.add-btn {
  margin-top: 10px;
}
</style>
